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srsran / srsRAN_Project

Open source O-RAN 5G CU/DU solution from Software Radio Systems (SRS) https://docs.srsran.com/projects/project
https://www.srsran.com
GNU Affero General Public License v3.0
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The PRACH detector will not meet the performance requirements with the configuration {Format 0, ZCZ 0, SCS 1.25kHz, Rx ports 1}. #450

Closed Erick5G closed 9 months ago

Erick5G commented 9 months ago

Issue Description

Good afternoon, I am starting out in this world of 5G. And I would like to ask for your support to resolve the following question.

When running through ZMQ, gnb shows the following error:

The PRACH detector will not meet the performance requirements with the configuration {Format 0, ZCZ 0, SCS 1.25kHz, Rx ports 1}. Lower PHY in executor blocking mode.

--== srsRAN gNB (commit 0b2702cca) ==--

Connecting to AMF on 127.0.0.5:38412 Available radio types: uhd and zmq. Cell pci=1, bw=10 MHz, dl_arfcn=368500 (n3), dl_freq=1842.5 MHz, dl_ssb_arfcn=367930, ul_freq=1747.5 MHz

Reviewing the default script when installing open5gs, I can see that the SCS has a value of 15 and not 1.25 as shown in the error. Attached script line : common_scs: 15 # Subcarrier spacing in kHz used for data.

What causes this error is that it cannot make a connection with the UE, because the parameters do not match.

So when the UE runs, it cannot detect a communication medium, therefore it cannot assign an address between GNB and UE.

Active RF plugins: libsrsran_rf_uhd.so libsrsran_rf_zmq.so Inactive RF plugins: Reading configuration file ue_5g_zmq.conf...

Built in Release mode using commit fa56836b1 on branch HEAD.

Opening 1 channels in RF device=zmq with args=tx_port=tcp://127.0.0.1:2001,rx_port=tcp://127.0.0.1:2000,base_srate=11.52e6 Supported RF device list: UHD zmq file CHx base_srate=11.52e6 Current sample rate is 1.92 MHz with a base rate of 11.52 MHz (x6 decimation) CH0 rx_port=tcp://127.0.0.1:2000 CH0 tx_port=tcp://127.0.0.1:2001 Current sample rate is 11.52 MHz with a base rate of 11.52 MHz (x1 decimation) Current sample rate is 11.52 MHz with a base rate of 11.52 MHz (x1 decimation) Waiting PHY to initialize ... done! Attaching UE...

The AMF and UPF files have been verified and are fine. While in the gnb it does not make a communication. 2024-02-03T17:56:46.789134 [GNB ] [I] Built in Release mode using commit 0b2702cca on branch main 2024-02-03T17:56:46.790226 [ALL ] [I] Task worker "phy_worker" started... 2024-02-03T17:56:46.790337 [ALL ] [I] Task worker "radio" started... 2024-02-03T17:56:46.790391 [ALL ] [I] Task worker "ru_stats_worker" started... 2024-02-03T17:56:46.790560 [GNB ] [I] Connecting to AMF (127.0.0.5).. 2024-02-03T17:56:46.790668 [GNB ] [I] AMF connection established 2024-02-03T17:56:46.791095 [GNB ] [I] Starting CU-CP... 2024-02-03T17:56:46.791214 [NGAP ] [I] Sending NgSetupRequest 2024-02-03T17:56:46.891370 [GNB ] [I] CU-CP started successfully 2024-02-03T17:56:46.891385 [UDP-GW ] [I] UDP GW configured. rx_max_mmsg=256 2024-02-03T17:56:46.892023 [GTPU ] [I] GTP-U demux. warn_on_drop=false 2024-02-03T17:56:46.892028 [GTPU ] [I] Tunnel added. teid=0x000000 2024-02-03T17:56:46.892080 [CU-UP ] [I] CU-UP starting... 2024-02-03T17:56:46.892229 [CU-CP ] [I] Added CU-UP 0 2024-02-03T17:56:46.892255 [CU-UP-E1] [I] Sending E1SetupRequest 2024-02-03T17:56:46.892271 [CU-UP-E1] [I] "E1AP CU-UP Setup Procedure" finalized 2024-02-03T17:56:46.892277 [CU-UP ] [I] CU-UP started successfully 2024-02-03T17:56:46.892589 [GNB ] [I] SSB derived parameters for cell: 1, band: 3, dl_arfcn:368500, crbs: 52 scs:15kHz, ssb_scs:15kHz:

If someone could help me solve this problem I would appreciate it.

Setup Details

[Specify details of the test setup. This would help us reproduce the problem reliably] e.g. Network configuration, Operation System, Hardware, RF front-end, library and driver versions Atached Scrips GNB

amf: addr: 127.0.0.5 #192.168.40.132 #10.10.1.2 # 10.53.1.1 # The address or hostname of the AMF. bind_addr: 127.0.0.5 #101.168.40.131 10.53.1.2 # A local IP that the gNB binds to for traffic from the AMF.

ru_sdr: device_driver: zmq # The RF driver name. device_args: tx_port=tcp://127.0.0.1:2000,rx_port=tcp://127.0.0.1:2001,base_srate=11.52e6 # Optionally pass arguments to the selected RF driver. srate: 11.52 # RF sample rate might need to be adjusted according to selected bandwidth. tx_gain: 75 # Transmit gain of the RF might need to adjusted to the given situation. rx_gain: 75 # Receive gain of the RF might need to adjusted to the given situation.

cell_cfg: dl_arfcn: 368500 # ARFCN of the downlink carrier (center frequency). band: 3 # The NR band. channel_bandwidth_MHz: 10 # Bandwith in MHz. Number of PRBs will be automatically derived. common_scs: 15 # Subcarrier spacing in kHz used for data. plmn: "00101" # PLMN broadcasted by the gNB. tac: 7 #7 # Tracking area code (needs to match the core configuration). pdcch: dedicated: ss2_type: common # Set search space to common to match capabilities dci_format_0_1_and_1_1: false # Use fallback DCI to match srsUE capabilities prach: prach_config_index: 1 # Set PRACH config index to match srsUE expectation

log: filename: /tmp/gnb.log # Path of the log file. all_level: info # Logging level applied to all layers. hex_max_size: 0

pcap: mac_enable: false # Set to true to enable MAC-layer PCAPs. mac_filename: /tmp/gnb_mac.pcap # Path where the MAC PCAP is stored. ngap_enable: false # Set to true to enable NGAP PCAPs. ngap_filename: /tmp/gnb_ngap.pcap # Path where the NGAP PCAP is stored.

AMF SCRIPT logger: file: /var/log/open5gs/amf.log

level: info # fatal|error|warn|info(default)|debug|trace

global: max: ue: 1024 # The number of UE can be increased depending on memory size.

peer: 64

amf: sbi: server:

Expected Behavior

[What you expect to happen]

Actual Behaviour

[What happens instead e.g. error message]

Steps to reproduce the problem

[Tell us how to reproduce this issue e.g. RF setup, application config files]

  1. Run gnb
  2. Check log.gnb
  3. Run ue

gnb.log ue.log

Additional Information

upf.log amf.log

pgawlowicz commented 9 months ago

See here https://github.com/srsran/srsRAN_Project/discussions/414